78234025 has 27 divisors (see below), whose sum is σ = 102144783. Its totient is φ = 59438400.

The previous prime is 78233999. The next prime is 78234029. The reversal of 78234025 is 52043287.

The square root of 78234025 is 8845.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 77915929 + 318096 = 8827^2 + 564^2 .

It is not a de Polignac number, because 78234025 - 2⁵ = 78233993 is a prime.

It is a super-2 number, since 2×78234025² = 12241125335401250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78234029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1282495 + ... + 1282555.

Almost surely, 2^78234025 is an apocalyptic number.

78234025 is the 8845-th square number.

78234025 is the 4423-rd centered octagonal number.

It is an amenable number.

78234025 is a deficient number, since it is larger than the sum of its proper divisors (23910758).

78234025 is an equidigital number, since it uses as much as digits as its factorization.

78234025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The cubic root of 78234025 is about 427.6927530398.

The spelling of 78234025 in words is "seventy-eight million, two hundred thirty-four thousand, twenty-five".